what I wanted to know is what are the sizes of these pieces of material? I want them to fit across my back when I have a top that shows bra closing at the back. is it wide enough to attach to the back bra straps? I could snap it to the bra where it connects. I hate to see bra straps. some bras need to be made that are just as pretty at the back as they are in front for when we wear low cut dresses/tops in the back